CN211610224U

CN211610224U - Extensible type broach for pediatric patient replacement surgery

Info

Publication number: CN211610224U
Application number: CN201922437271.4U
Authority: CN
Inventors: 朱建磊; 徐宁
Original assignee: Beijing Lidakang Technology Co Ltd
Current assignee: Beijing Lidakang Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-10-02
Anticipated expiration: 2029-12-30

Abstract

The utility model provides a can prolong type broach for paediatrics patient replacement operation, including extension section and broach, connect through the two-way regulation structure between extension section and the broach, extension section and broach extend in opposite directions through the regulating action of two-way regulation structure. The utility model discloses a right-handed thread and left-handed thread's adjusting screw link into an integrated entity broach and extension section simultaneously, directly adjust the regulation hole on the swivel nut with special instrument during the extension just can make the two-way extension of false body to reach false body extension purpose. In the utility model, the aperture of the adjusting hole is phi 5mm, and the incision 10mm is enough in the operation, thereby reducing the operation time and the operation infection probability.

Description

Extensible type broach for pediatric patient replacement surgery

Technical Field

The utility model belongs to the III types of implants of medical instrument, concretely relates to can prolong type broach for paediatrics patient replacement operation.

Background

Along with the increase of the height of the pediatric patient, the length of the primary operation replacement prosthesis cannot meet the height requirement of the pediatric patient, and the prosthesis needs to be prolonged to enable the heights of two affected limbs of the pediatric patient to be the same

The existing extendable prosthesis adopts a one-way threaded rod, a nut is directly jacked to an extension sleeve to displace by rotating the nut, and then the nut is locked by two fixing screws, and the distance between the nut and a mounting hole of the fixing screw is at least 4cm, so that when the prosthesis is extended in an operation, the minimum surgical incision is not less than 4cm, the larger the surgical incision is, the higher the infection rate is; the fixing screw is loosened firstly and then screwed after the adjustment is finished, so that the operation time is longer, and the operation wind direction is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can prolong type broach for paediatrics patient replacement operation reduces operation time, reduces operation infection probability.

In order to achieve the above object, the utility model provides a following technical scheme:

an extensible type broach used for replacement surgery of a pediatric patient comprises an extension section and the broach, wherein the extension section is connected with the broach through a bidirectional adjusting structure, and the extension section and the broach extend towards each other through the adjusting effect of the bidirectional adjusting structure.

The bidirectional adjusting structure comprises a right-handed inner threaded hole arranged in the extension section, a left-handed inner threaded hole arranged in the intramedullary nail and an adjusting screw rod, wherein the adjusting screw rod is integrally formed by a right-handed outer threaded rod, a left-handed outer threaded rod and a rotating nut;

the right-handed external thread rod is screwed in the right-handed internal thread hole, and the left-handed external thread rod is screwed in the left-handed internal thread hole.

The rotary nut is provided with a radial adjusting hole, and the aperture of the adjusting hole is 5 mm. The aperture of the adjusting hole is phi 5mm, and 10mm of incision is enough in the operation, thereby reducing the operation time and the operation infection probability.

The extensible type broach for the pediatric patient replacement surgery further comprises a locking pin, wherein a locking hole communicated with the left-handed inner threaded hole is formed in the broach in the radial direction, the locking pin is inserted into the locking hole, and the top end of the locking pin is abutted and limited with the left-handed outer threaded rod.

The left-handed external thread rod is provided with a ratchet wheel section, the locking hole is opened corresponding to the ratchet wheel section, a locking pin, a spring and a locking nut are sequentially arranged in the locking hole from inside to outside, the inner end of the locking pin is provided with a pawl, the ratchet wheel section is provided with a ratchet and a tooth groove, and the pawl is inserted in the tooth groove.

Wherein, the extension section is by spiro union section and linkage segment integrated into one piece, be equipped with dextrorotation internal thread hole in the spiro union section, the linkage segment is connected with thighbone condyle, shin bone end, the external diameter of linkage segment is less than the external diameter of spiro union section, the outer cylinder of linkage segment is for following the tip to the toper face that spiro union section external diameter increases in proper order, the linkage segment adopts the tapering to compress tightly the mode and is connected with thighbone condyle, shin bone end.

Preferably, the rotating nut is provided with a plurality of adjusting holes distributed along the circumferential direction, so that special instruments can be conveniently inserted into the adjusting holes at different positions.

The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

1. the utility model discloses a right-handed thread and left-handed thread's adjusting screw link into an integrated entity broach and extension section simultaneously, directly adjust the regulation hole on the swivel nut with special instrument during the extension just can make the two-way extension of false body to reach false body extension purpose.

2. In the utility model, the aperture of the adjusting hole is phi 5mm, and the incision 10mm is enough in the operation, thereby reducing the operation time and the operation infection probability.

3. The outside of the broach of the utility model is a locking pin adopting a ratchet wheel mode to prevent the reverse rotation of the prosthesis.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure of the middle extension section of the present invention;

FIG. 3 is an enlarged view of the middle broach according to the present invention;

FIG. 4 is an enlarged view of the structure of the adjusting screw of the present invention;

fig. 5 is an enlarged view of a cross-sectional view of the locking pin according to the present invention.

Reference numerals:

1. an extension section; 10. a right-handed inner threaded hole; 11. a connecting section; 2. a broach; 20. a left-handed internal threaded hole; 21. a locking hole; 3. adjusting the screw rod; 30. a right-handed externally threaded rod; 31. a left-handed externally threaded rod; 311. a ratchet wheel section; 32. rotating the nut; 320. an adjustment hole; 4. a locking pin; 41. a pawl; 5. locking the nut; 6. a spring.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model provides an extensible type broach for replacement operation of pediatric patients, aiming at the problems that the prior extensible type false body can only be prolonged by one end, the size of the operation incision is large, the operation time is long and the probability of operation infection is high.

As shown in fig. 1, the embodiment of the present invention provides an extendable broach for replacement surgery of pediatric patients, which includes an extension section 1 and a broach 2, the extension section 1 is connected with the broach 2 through a two-way adjusting structure, and the extension section 1 and the broach 2 extend toward each other through the adjusting function of the two-way adjusting structure.

As shown in fig. 2 to 4, the bidirectional adjusting structure comprises a right-handed internal thread hole 10 arranged in the extension section 1, a left-handed internal thread hole 20 arranged in the broach 2, and an adjusting screw 3, wherein the adjusting screw 3 is integrally formed by a right-handed external thread rod 30, a left-handed external thread rod 31, and a rotating nut 32, the rotating nut 32 is arranged between the right-handed external thread rod 30 and the left-handed external thread rod 31, and the outer diameter of the rotating nut 32 is larger than the outer diameters of the right-handed external thread rod 30 and the left-handed external thread rod 31.

The right-handed external thread rod 30 is screwed in the right-handed internal thread hole 10, and the left-handed external thread rod 31 is screwed in the left-handed internal thread hole 20.

Be equipped with a plurality of radial regulation holes 320 along the circumference equipartition on swivel nut 32, the aperture of adjusting holes 320 is 5 mm. The aperture of the adjusting hole is phi 5mm, and the incision of 10mm in the operation is enough to allow a special instrument to be inserted into the adjusting hole from the incision to rotate the rotating nut, so that the operation time is reduced, and the operation infection probability is reduced.

The extensible type broach for the pediatric patient replacement surgery further comprises a locking pin 4, a locking hole 21 communicated with the left-handed inner threaded hole 20 in the radial direction is formed in the broach 2, the locking pin 4 is inserted into the locking hole 21, and the top end of the locking pin 4 is abutted to and limited by the left-handed outer threaded rod 31. The outside of the medullary needle is provided with a locking pin in a ratchet wheel mode to prevent the reverse rotation of the prosthesis.

The structure of the locking pin 4 is as shown in fig. 5, a ratchet section 311 is arranged on the left-hand external thread rod 31, the locking hole 21 is opened corresponding to the ratchet section 311, the locking pin 4, the spring 6 and the locking nut 5 are sequentially arranged in the locking hole 21 from inside to outside, a pawl 41 is arranged at the inner end of the locking pin 4, a ratchet and a tooth socket are arranged on the ratchet section 311, and the pawl 41 is inserted in the tooth socket. As shown in fig. 5, the left-hand externally threaded rod 31 is rotated counterclockwise, the pawl 41 slides over the back of the teeth of the ratchet wheel section 311, and when the left-hand externally threaded rod 31 is rotated by an angle (a multiple of the angle between the two ratchet teeth), the pawl 41 is inserted into the tooth groove corresponding to the locking hole 21 at this time, preventing the left-hand externally threaded rod 31 from being reversed.

In this embodiment, extension section 1 is by spiro union section and 11 integrated into one piece of linkage section, be equipped with dextrorotation internal thread hole 10 in the spiro union section, linkage section 11 is connected with thighbone condyle, shin bone end, the external diameter of linkage section 11 is less than the external diameter of spiro union section, the outer cylinder of linkage section 11 is for following the tip to the toper face that the spiro union section external diameter increases in proper order, linkage section 11 adopts the tapering to compress tightly the mode and is connected with thighbone condyle, shin bone end.

The following detailed description describes the use of the present invention:

the utility model discloses a can prolong type broach arranges in suffering from the limb, when infant patient's height increases, for making the highly uniform of two limbs, need the extension first arrange the false body in suffering from the limb in, during the replacement operation, earlier set up the incision in the position that corresponds with swivel nut, expose at least one regulation hole, because the aperture of regulation hole is 5mm, the incision width is 10mm enough to make special apparatus stretch into to the regulation hole from the incision, pull special apparatus, drive swivel nut and rotate, adjusting screw's dextrorotation threaded rod and levogyration threaded rod make extension section and broach prolong simultaneously to two directions, realize the two-way extension of broach, shorten operation time, reduce operation infection probability.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

In the description of the present invention, it is to be understood that the terms "upper", "one end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that the terms "provided with" and "connected" are to be interpreted broadly, unless explicitly stated or limited otherwise. For example, the connection can be fixed, detachable or integrated; may be directly connected or indirectly connected through an intermediate. The fixed connection can be common technical schemes such as welding, threaded connection and clamping. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The extensible type broach used for pediatric patient replacement surgery is characterized by comprising an extension section and a broach, wherein the extension section is connected with the broach through a bidirectional adjusting structure, and the extension section and the broach extend towards each other through the adjusting effect of the bidirectional adjusting structure.

2. The extendable broach for replacement surgery in pediatric patients according to claim 1, wherein the bidirectional adjustment structure comprises a right-handed internal threaded hole provided in the extension section, a left-handed internal threaded hole provided in the broach, and an adjustment screw integrally formed by a right-handed externally threaded rod, a left-handed externally threaded rod, and a swivel nut provided between the right-handed externally threaded rod and the left-handed externally threaded rod, and having an outer diameter greater than outer diameters of the right-handed externally threaded rod and the left-handed externally threaded rod;

3. The extendable broach for pediatric patient replacement surgery as in claim 2, wherein the rotation nut is provided with radial adjustment holes having a diameter of 5 mm.

4. The extendable broach for pediatric patient replacement surgery as defined in claim 2, further comprising a locking pin, wherein the broach is provided with a locking hole radially communicated with the left-handed internal threaded hole, the locking pin is inserted into the locking hole, and the top end of the locking pin is abutted against and limited by the left-handed external threaded rod.

5. The extendable broach for pediatric patient replacement surgery according to claim 4, wherein the left-handed externally threaded rod is provided with a ratchet section, the locking hole is opened corresponding to the ratchet section, the locking hole is internally and externally provided with a locking pin, a spring and a locking nut in sequence, the inner end of the locking pin is provided with a pawl, the ratchet section is provided with a ratchet and a tooth socket, and the pawl is inserted into the tooth socket.

6. The extendable broach for pediatric patient replacement surgery according to claim 1 or 2, wherein the extension segment is integrally formed by a screw connection segment and a connection segment, a right-handed internal thread hole is formed in the screw connection segment, the connection segment is connected with a femoral condyle and a tibial end, the outer diameter of the connection segment is smaller than the outer diameter of the screw connection segment, the outer cylindrical surface of the connection segment is a conical surface which increases from the end part to the outer diameter of the screw connection segment in sequence, and the connection segment is connected with the femoral condyle and the tibial end in a taper compression mode.

7. The extendable broach for pediatric patient replacement surgery as in claim 3, wherein the rotation nut is provided with a plurality of adjustment holes distributed circumferentially.